>> Of course they are allowed. What rule do you imagine they migh >> violate? spec gives a maximum length, but there is no minimum. > Well, for example, there are (maybe?) physical specs for the > dimensions and appearance of the external shaped strain-relief part > of the USB connector, right? I myself have run into the annoyance of > being unable to plug a flash drive into a USB slot on a computer, > because the slot next to it was occupied and didn't leave room for > the THICKNESS of the drive. I've run into that same situation. The USB memory dongle in question (from a name brand) came with a male-A/female-A cable to be used in that case. Raises interesting questions of "is it an extension if it's the only cable involved" - eh? :-) Lee Jones -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist